| H_∞ drift control of time-delayed seismic structures |
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| 作者姓名： | Chang-Ching Chang |
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| 作者单位： | Department of Civil Engineering, Chung Hsing University （NCHU）, Taichung 40227, Chinese Taipei |
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| 基金项目： | Ministry of Education and the Science Council (NSC) of Taiwan Under the ATU plan and Grants No. NSC 95-2625-Z-005-009 |
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| 摘 要： | In this paper,an optimal H∞ control algorithm was applied to the design of an active tendon system installed at the first story of a multi-story building to reduce its interstory drift due to earthquake excitations.To achieve optimal control performance and to guarantee the stability of the control system,an optimum strategy to select control parameters γ and α was developed.Analytical expressions of the upper and the lower bounds of γ and α were obtained for a single degree-of-freedom system with state fee...
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| 关 键 词： | H∞控制 时间延迟 抗震结构 状态反馈控制系统 漂移 控制算法 控制性能 优化设计 |
H
∞ drift control of time-delayed seismic structures |
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| Chang-Ching Chang.H
∞ drift control of time-delayed seismic structures[J].Earthquake Engineering and Engineering Vibration,2009,8(4):617-626. |
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| Authors: | Chang-Ching Chang Chi-Chang Lin |
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| Institution: | Department of Civil Engineering, Chung Hsing University NCHU, Taichung 40227, Chinese Taipei |
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| Abstract: | In this paper, an optimal H
∞ control algorithm was applied to the design of an active tendon system installed at the first story of a multi-story building
to reduce its interstory drift due to earthquake excitations. To achieve optimal control performance and to guarantee the
stability of the control system, an optimum strategy to select control parameters γ and α was developed. Analytical expressions of the upper and the lower bounds of γ and α were obtained for a single degree-of-freedom system with state feedback control. The selection ranges for both γ and α are graphically defined so that the controlled system is always stable and the control performance is better than by the
conventional LQR control algorithm. Numerical results from a controlled three-story building under real earthquake excitations
demonstrate that the peak first interstory drift can be significantly reduced with maximum control force around 10% of the
building weight. An optimum design flow chart was provided. In addition, for a time-delayed structure, this study gave explicit
formulae to calculate the critical values of γ and α. The system stability and control performance can thus be guaranteed even with time delay. |
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| Keywords: | time delay stability analysis active control active tendon system state feedback control |
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